PyPI · npm100Exceptionalhealth index
Python · TypeScript★ 11.2KAug 28, 2026
PyPI · npm99Exceptionalhealth index
Python★ 4,442↓ 14.6M/moAug 27, 2026
npm98Exceptionalhealth index

mastra-ai/mastraMastra is the modern TypeScript framework for AI-powered applications and agents.
TypeScript★ 28.1K↓ 70K/moSep 16, 2026
PyPI94Exceptionalhealth index
Python★ 29.5K↓ 257.6K/moSep 16, 2026
PyPI94Exceptionalhealth index

truera/trulensEvaluation and Tracking for LLM Experiments and AI Agents
Python★ 3,561Sep 17, 2026
PyPI · npm93Exceptionalhealth index
Python★ 4,694Aug 27, 2026
PyPI · npm93Exceptionalhealth index
Python · TypeScript★ 669Oct 19, 2026
PyPI · npm92Excellenthealth index

UiPath/coder_evalPlaywright for coding agents. Test that your skills, MCP servers, and CLIs actually work when an agent uses them — sandboxed YAML suites, A/B experiments, CI gates.
Python · TypeScript★ 152↓ 7,982/moOct 19, 2026
PyPI92Excellenthealth index
Python★ 302↓ 21.5K/moSep 20, 2026
PyPI91Excellenthealth index

Kiln-AI/KilnBuild, Evaluate, and Optimize AI Systems. Includes evals, RAG, agents, fine-tuning, synthetic data generation, dataset management, MCP, and more.
Python · Svelte · TypeScript★ 5,075↓ 1,637/moSep 19, 2026
npm91Excellenthealth index
TypeScript · JavaScript★ 311↓ 38K/moOct 15, 2026
npm · PyPI · crates.io90Excellenthealth index

FailproofAI/failproofaiObservability and enforcement for AI agent harnesses. Capture every run and runtime reliability with policy enforcement. 40 built-in policies, a local dashboard, no account required with a generous free cloud plan
MDX · TypeScript · Python★ 2,451↓ 9,921/moSep 9, 2026
npm89Excellenthealth index

MCPJam/inspectorTesting and evaluation platform to chat, inspect, and debug MCP servers, MCP apps, and ChatGPT apps.
TypeScript★ 2,195↓ 20.6K/moSep 10, 2026
PyPI89Excellenthealth index

PrimeIntellect-ai/primeOfficial CLI and Python SDK for Prime Intellect - access GPU compute, remote sandboxes, RL environments, and distributed training infrastructure for AI development at scale.
Python★ 319↓ 1.5M/moSep 9, 2026
npm · PyPI87Excellenthealth index
TypeScript★ 51↓ 14.7K/moOct 8, 2026
npm86Excellenthealth index
TypeScript★ 22↓ 9,468/moSep 13, 2026
PyPI84Excellenthealth index
Python★ 349↓ 14.3K/moSep 17, 2026
npm84Excellenthealth index

getlarge/themoltnetGive an agent a job, not your keys. Open-source control plane for AI agent work: each agent gets its own identity, a bounded job, and a signed record of what it did.
TypeScript · Go★ 16↓ 4,548/moSep 14, 2026
npm84Excellenthealth index

spences10/my-piComposable Pi coding agent with MCP, LSP, agent chains, prompt presets, and local eval telemetry
TypeScript★ 124↓ 2,112/moSep 10, 2026
Hex · npm83Excellenthealth index

ccarvalho-eng/aludelPhoenix-native LLM evaluation, prompt testing, model comparison, red teaming, and observability for Elixir
Elixir · JavaScript · HTML★ 36↓ 1,387/moSep 9, 2026
RubyGems81Excellenthealth index

Coolhand-Labs/coolhand-rubyZero-config LLM cost & quality monitoring for Ruby apps - automatically log AI API calls and collect user feedback for analysis using Coolhand.
Ruby★ 10Oct 14, 2026
PyPI · npm80Excellenthealth index

AgentOps-AI/agentopsPython SDK for AI agent monitoring, LLM cost tracking, benchmarking, and more. Integrates with most LLMs and agent frameworks including CrewAI, Agno, OpenAI Agents SDK, Langchain, Autogen, AG2, and CamelAI
Python · TypeScript★ 5,801↓ 248.9K/moAug 28, 2026

attenlabs/hotatoFind what broke in your agent calls. Pin it so it never ships again. Local voice-agent call forensics and regression guards.
Python★ 2↓ 295/moOct 20, 2026
npm · PyPI · Go78Goodhealth index

memoturn/memoturnOpen-source AI engineering platform — LLM observability, evals, metrics, prompt management, playground, and datasets. OpenTelemetry-native, self-hostable. Because "it worked when I tried it" is not an eval.
TypeScript★ 1↓ 646/moOct 3, 2026

zernie/vigilesLike Lighthouse for your agent harness - verify your CLAUDE.md/AGENTS.md, skills & hooks are real, then test and measure they actually work. Claude Code + Codex.
TypeScript★ 15↓ 6,794/moSep 11, 2026
C#★ 56Oct 19, 2026

o-stepper/graphorinProject Graphorin is a TypeScript framework for personal AI assistants and long-living agents with rich memory, durable workflow, and observability out of the box.
TypeScript★ 3↓ 2,359/moSep 15, 2026

superlinear-ai/raglite🥤 RAGLite is a Python toolkit for Retrieval-Augmented Generation (RAG) with DuckDB or PostgreSQL
Python★ 1,200↓ 644/moSep 17, 2026
npm · crates.io71Goodhealth index

wanxunyang/mocodeTerminal coding agent with durable memory, hash-gated skill trust and a 61-task eval harness. Works with any OpenAI-compatible backend (GLM / DeepSeek / Qwen / Ollama).
TypeScript★ 3↓ 5,356/moOct 20, 2026
Python★ 2↓ 1,754/moSep 13, 2026